负载均衡----LVS

苏泽湛

　　系统：Ubuntu11.0
　　VS Server：
Eth0：192.168.8.135/255.255.255.0/192.168.8.255
Eth0:1：192.168.8.155/ 255.255.255.255 (VIP)
 
Real Server A：
Eth0：192.168.8.134/255.255.255.0/192.168.8.255
Lo:0：192.168.8.155/ 255.255.255.255 (VIP)
 
 
RealServer B：
Eth0：192.168.8.131/255.255.255.0/192.168.8.255
Lo:0：192.168.8.155/ 255.255.255.255 (VIP)
　　安装LVS
　　apt-get install ipvsadm
　　负载服务器：
　　#!/bin/bash
echo 1 > /proc/sys/net/ipv4/ip_forward
　　echo "0" >/proc/sys/net/ipv4/conf/all/send_redirects
echo "0" >/proc/sys/net/ipv4/conf/default/send_redirects
echo "0" >/proc/sys/net/ipv4/conf/default/send_redirects
echo "0" >/proc/sys/net/ipv4/conf/eth0/send_redirects
 
IPVSADM='/sbin/ipvsadm'
VIP=192.168.8.155
RS1=192.168.8.134
RS2=192.168.8.131
 
ifconfig eth0:1 $VIP broadcast $VIP netmask 255.255.255.255 up
route add -host $VIP dev eth0:1
#route del -host $VIP dev eth0:1
 
$IPVSADM -C
$IPVSADM -A -t $VIP:8080 -s lc -p 600
$IPVSADM -a -t $VIP:8080 -r $RS1:8080 -g -w 1
$IPVSADM -a -t $VIP:8080 -r $RS2:8080 -g -w 1
　　RealServer，两台一样：
　　#!/bin/bash
　　echo 1 > /proc/sys/net/ipv4/ip_forward
VIP=192.168.8.155
 
ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
route add -host $VIP dev lo:0
 
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
　　
route add default gw $VIP
　　sysctl -p